Answer:
4
Step-by-step explanation:
The length of CD will be twice the distance from the midpoint to the endpoint
To calculate the length use the distance formula
d = √ (x₂ - x₁ )² + (y₂ - y₁ )²
with (x₁, y₁ ) = (2, - 1) and (x₂, y₂ ) = (8, 3)
d = 2 × 
= 2 × 
= 2 × 
= 2 × 
= 2 × 2 = 4 ← exact length
Answer:
Yes the y-intercept is -1 so True
Yes the rate of change or slope is 2 so True
And Yes the equation is not y=2x+1 it is suppose to be y=2x-1 so False
Step-by-step explanation:
Hope this Helps!
Answer:
x=9
Step-by-step explanation:
To find the x-coordinate, plug the y-coordinate into the equation and solve from there.
(0 = 2/3x - 6) (6 = 2/3x) (18 = 2x) 9 = x
Answer:
..
Step-by-step explanation:
no the correct point would be (7,12)
7x1=7
7+5=12
Answer:
If AB is a tangent to the circle, the triangle ABO is right angled, as the angle where a tangent meets the circumference is always 90 degrees.
We also know that Pythogoras' theorem only holds for right angled triangles.
The hypotenuse is 12 + 8 as 12 is the radius so is 20.
16^2+12^2 = 256 + 144 = 400 = 20^2 so AB must be tangent.
